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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Iron mineralogy and aqueous alteration from Husband Hill through Home Plate at Gusev Crater, Mars: Results from the Mössbauer instrument on the Spirit Mars Exploration Rover
Authors: Morris, Richard Van
Klingelhoefer, Goestar
Schröder, Christian
Fleischer, Iris
Ming, Douglas Wayne
Yen, Albert S
Gellert, Ralf
Arvidson, Raymond E
Rodionov, Daniel S
Crumpler, Larry S
Clark, Benton C
Cohen, Barbara A
McCoy, Timothy J
Mittlefehldt, David W
Schmidt, Mariek E
de, Souza Jr Paulo A
Squyres, Steven W
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Keywords: Mars
Issue Date: 23-Dec-2008
Publisher: American Geophysical Union
Citation: Morris RV, Klingelhoefer G, Schröder C, Fleischer I, Ming DW, Yen AS, Gellert R, Arvidson RE, Rodionov DS, Crumpler LS, Clark BC, Cohen BA, McCoy TJ, Mittlefehldt DW, Schmidt ME, de Souza Jr PA & Squyres SW (2008) Iron mineralogy and aqueous alteration from Husband Hill through Home Plate at Gusev Crater, Mars: Results from the Mössbauer instrument on the Spirit Mars Exploration Rover, Journal of Geophysical Research: Planets, 113 (E12), Art. No.: E12S42.
Abstract: Spirit’s Mössbauer (MB) instrument determined the Fe mineralogy and oxidation state of 71 rocks and 43 soils during its exploration of the Gusev plains and the Columbia Hills (West Spur, Husband Hill, Haskin Ridge, northern Inner Basin, and Home Plate) on Mars. The plains are predominantly float rocks and soil derived from olivine basalts. Outcrops at West Spur and on Husband Hill have experienced pervasive aqueous alteration as indicated by the presence of goethite. Olivine-rich outcrops in a possible mafic/ultramafic horizon are present on Haskin Ridge. Relatively unaltered basalt and olivine basalt float rocks occur at isolated locations throughout the Columbia Hills. Basalt and olivine basalt outcrops are found at and near Home Plate, a putative hydrovolcanic structure. At least three pyroxene compositions are indicated by MB data. MB spectra of outcrops Barnhill and Torquas resemble palagonitic material and thus possible supergene aqueous alteration. Deposits of Fe 3+-sulfate soil, located at Paso Robles, Arad, and Tyrone, are likely products of acid sulfate fumarolic and/or hydrothermal activity, possibly in connection with Home Plate volcanism. Hematite-rich outcrops between Home Plate and Tyrone (e.g., Montalva) may also be products of this aqueous activity. Low water-to-rock ratios (isochemical alteration) are implied during palagonite, goethite, and hematite formation because bulk chemical compositions are basaltic (SO3-free basis). High water-to-rock ratios (leaching) under acid sulfate conditions are implied for the high-SiO2 rock and soil in Eastern Valley and the float rock FuzzySmith, which has possible pyrite/marcasite as a hydrothermal alteration product.
Type: Journal Article
DOI Link:
Rights: Copyright 2008 by the American Geophysical Union. AGU allows authors to deposit their journal articles if the version is the final published citable version of record, the AGU copyright statement is clearly visible on the posting, and the posting is made 6 months after official publication by the AGU.
Affiliation: National Aeronautics and Space Administration (NASA)
Johannes Gutenberg University of Mainz
Biological and Environmental Sciences
Johannes Gutenberg University of Mainz
National Aeronautics and Space Administration (NASA)
California Institute of Technology
University of Guelph
Washington University In Saint Louis
Johannes Gutenberg University of Mainz
New Mexico Museum of Natural History and Science
Lockheed Martin Corporation
National Aeronautics and Space Administration (NASA)
National Aeronautics and Space Administration (NASA)
University of Tasmania
Cornell University

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